Costa Rica weather

Our guide to the weather in Costa Rica during September

23

Average high

5

UV Index

91mm

Month rainfall

89%

Humidity

We've looked at the most up-to-date weather data for Costa Rica, covering the last 12 years up to 2021, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Costa Rica weather in September.

How warm is it in Costa Rica during September?

The temperature reaches around 23℃ during the daytime in September, falling away to 16℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.

Does it rain in Costa Rica during September?

On average, there will be 30 rainy days during the month, amounting to 91.3mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. There's a good chance that you'll catch a thunderstorm during your trip.

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Costa Rica Blog posts

From the UK's most popular travel bloggers

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2nd June 2021 by PommieTravels

A travel guide to Guanacaste, Costa Rica

Located in the northern Pacific region of Costa Rica, Guanacaste encapsulates the life-affirming notions of spiritual nourishment, peace, and harmony. That is what draws millions of visitors to this destination every year. The place is vast and includes the famous Gold coast, which is some 400 miles of the coastline where prime beaches are drawing suffers from worldwide. There are also other remote beaches at Nicoya Peninsular, ideal for travelers who seek tranquility and relaxation....

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19th January 2021 by PommieTravels

5 Costa Rica travel tips for an unforgettable holiday

Are you desperately craving a break from your mundane life? Does the idea of lazing around on a sunkissed beach sound amazing? How about going surfing in the crystal-clear Pacific waters or even indulging in snorkeling and scuba diving? Add some enigmatic volcanoes and exotic wildlife to that mix and you have the perfect Central American holiday. But what’s the best place to experience the most of Latin America as a tourist? Ask most avid travelers and they’ll echo a unanimous answer –...

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12th February 2021 by Andy

Cheapest places to holiday in May

May is, arguably, one of the best months of the year to take a break, across the globe. Mainly, because you can take advantage of the May Bank Holidays, but you’ve just missed the rush of the Easter season. Then, there’s absolutely gorgeous weather, from the Mediterranean to the Caribbean.You’re likely to find bargains too, for hotels, flights, cruises and all-inclusive deals, as prices drop after April. Get ready to pack your beach towel, don’t forget your flip flops and make the most...

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22nd April 2020 by PommieTravels

Holiday activities and the best hotels in Jaco Costa Rica

Are you planning your next holiday and do not know what to choose between beaches, mountains or wildlife? There is one place in Central America that has it all and some volcanos on top of everything. I’m talking about Costa Rica, one of the most amazing destinations in the whole wide world. A place you will fall for once you get there....

Weather in Costa Rica

Our month-by-month guide to the weather and climate in Costa Rica

23.4

Costa Rica weather in

January
24.3

Costa Rica weather in

February
24.9

Costa Rica weather in

March
25.1

Costa Rica weather in

April
23.6

Costa Rica weather in

May
22.9

Costa Rica weather in

June
22.8

Costa Rica weather in

July
23.1

Costa Rica weather in

August
23.0

Costa Rica weather in

September
22.2

Costa Rica weather in

October
22.2

Costa Rica weather in

November
22.6

Costa Rica weather in

December